Spinning machine



Feb. 11, 1930. H H LEGNARD 1,746,433l

SPINNING MACHINE Filed April 20, 192e 2 sheets-sheet 1 Fig. l.l

InvenTor. Herman H. Leonard Feb.11,1930. H HLEONARD 1,746,433 l SPINNING MAcHNE Filed April 20. 192e 2y Sheets-sheet 2 1 i Hgl 2. F1g3.

Inventor. Herman H. Leonard y Atys,

" claims.

Patented Feb. 11, `17930 UNITED STATES PATENT OFFICE HERMAN H. LEONARD, 0F NORTH ANIJovHH, MASSACHUSETTS, AsSIGNon To DAVIS e rumana MACHINE COMPANY, oFNonTH ANnovna, MASSACHUSETTS, A oonrona TIoN 0F MASSACHUSETTS y o SPINNING y Application led April 20,

strain `of the `drawing and spinning operations.

. The present invention has` forits object to provide` a twister tube ofa Simple and novel construction enabling `it to be self* l' threading and enabling it tocooperate etticiently with the drawing rolls.

The invention has for its further object to provide means for mounting and adjusting each twister tube with respect to the cooperating drawingrolls.

The invention has for its further object toprovide means for adjustingas a unit a series of twistertubes with respect to their cooperating drawing rolls.

The invention has for its further obj ect to provide novel and efhcient means for mount ing and supporting the twister tubes.v

These and other objects and features of` the invention will appear more fully from the `accompanying description and drawings and will be particularly pointed out in the The inventionisshown in connection with a ring spinning'frame of a generally familiar type, and as the construction and operation ofsuch a spinning frame is well known to those skilled in the art, it is only necessary here to illustrate and describe certain novel features of the frame, together with those features with which the present invention is particularly concerned.

ln the drawings:

Fig. 1 is an end elevation partially in vertical cross Section of a portion of a ring spinning frame looking toward the end opposite to that at which the driving connections are located.

2 is an enlargedend elevationof that portion of the frame shown in Fig. 1 where MACHINE` 19`2s. serial No. 271,490.

the twister tubes and drawing rolls are located.

Fig. 3 is a rear elevation of the portion of the construction shown in Fig. 2.

Fig. 4 is an enlarged detail chiefiy in cross section taken on the line 41-4 of Fig; 3.

.Fig 5 is a perspective view showing a twister tube supporting bracket arm.

Fig. 6 is a `detail of the lower end ofta twister tube.

Fig. 7 is an enlarged end elevation, partially in vertical cross section, showing a separator plate. l

Fig. 8 is" a rear elevation of a portionof the construction showing the separator plates and their mounting's.`

The spinning frame, which is herein illustratedin Aconnection with a preferred embodiment of the present invention, comprises end frames such as 1 which are connected by the usual girders such as 2, 3, 4: and 5, by the shaft 6 carrying the whirl driving drum 7 by the shaft 8 carrying the twister tube driving drum" 9 and by the various other .necessary shafts. These spinning frames usually carry a longitudinal series of spinning elements, one at each side of the frame, and as these are of the same construction and as each unit in the series is of thesame construction, it is suicient here to illustrate and describe a singleV unit at one side of the frame.

The roving is wound on large spools 10, the gudgeons 11 of which slide vertically in slotted bearings in a bracket 12 mounted at the top of the frame. The rovingmass on these spools rests peripherally on a corrugated driving drum 13 mounted in bearings 14 at the top of the frame. These drums therefore serve to advance the roving '15 at a uniform linear speed to the first pair of rolls `16 and 17, the former of which is positively driven and the latter of which rests by gravity on the former and thus insures the feed. From this pair of rollsthe roving passes through the twister tube 18 to the second pair of rolls for drawing the roving. The lower roll 19 of'this pair is usually corrugated and extends throughouta long series of spinning units,

has its gudgeons 20 mounted in bearings 21 on the frame, and is positively driven at a faster peripheral speed than the roll 16 so as to effect the drawing action. The roving is held in contact with this roll 19 by rolls 22 mounted in bearing brackets 23 to slide by gravit toward the roll 19. From the draw ing ro ls 19 and 22 the roving passes adjacent the`usual clearer rolls 24 and 25, the former of which is usually covered with a pile fabric to catch and remove loose fibres. The roving then passes through the usual guide eye 26 mounted on the thread board 27 supported on the frame to the spinning element herein shown as of the ring type.

The bobbin, not shown, upon which the roving is twisted and wound in the form of yarn, is carried by the rotating s indie 28, mounted in vertical bearings in t e frame and provided with the vertical whirl 29 by means of which it is rotated. The whirl is driven by an endless belt 30, usually driving a plurality of the spinning units at the salne time, from the drum 7. The traveler 31 runs on the ring 32 carried by the traverse bar 33, which is moved u and down in the usual manner by suitable traverse mechanism. Thus the roving is spun and wound in the usual manner.

The drawing rolls 19 and 22 present sections for drawing each roving so that there is a longitudinal series of pairs of these drawing rolls throughout the length of the frame, one pair for each roving. With each pair is associated a twister tube for giving the desired false twist to the roving by which sufficient strength is imparted vthereto to enable the roving to withstand the drawing action.

The twister tubes are carried by a twister m,tube supporting shaft 34 jou'inalled at its ends inbearings in the frame brackets 35. This shaft is rotarily adjustable in the frame by means of a radially projecting handle 36 keyed at 37 to the shaft. The shaft is locked in its desired position of rotary adjustment by suitable means herein shown as a cooperating locking stud and arcuate slot. In the construction illustrated the arcuate slot 38 is formed in the frame bracket concentric with the center of the shaft and the locking stud is in the form of a bolt 39 mounted in the handle 36.

Each twister tube 18 is provided with a whirl 4() by Vwhich it is rotated by means of a driving belt 41 from the drum 9.

Each twister tube is shown as carried on the supporting shaft 34 by means of a bracket arm composed of two sections, illustrated in Fig. 5. The lower section 42 of the bracket i arm comprises a'flat plate 43 projecting radially of the shaft 34 having at its free end a U-shaped socket 44 fitting the shaft 34 and carryi. a clamping screw 45, bymeans of whichntliis section, and-consequently the entire bracket arm, is adjustable both rotarily and longitudinally of the shaft. The other section 46 of the bracket arm comprises a flat plate 47 terminating at its free end in U-shaped bifurcations 48 and 49 forming aligned bearings for the twister tube. This portion of the section is also provided with a pocket in which is placed an absorbent packing 50 for supplying lubricant to the bearing surfaces. The adjacent ends of the two bracket arm sections constituted by the plates 43 and 47 overlap and one is preferably provided with spacing ribs 5l. Each section is provided with a slot, the slot in one section, such as the slot 52 in the plate 43, extending at right angles to the slot in the other section, such as the slot 53 in the plate 47, and a clamping bolt 54 secures together the said sections, thus enabling the bearing for the twister tube to be adjusted radially toward and from the supporting shaft and also to be adjusted longitudinally in line with its axis, while maintaining the axis of the twister tube parallel to a given tangent to the supporting shaft.

The twister tube is short and compact. It is of generally cylindrical shape with the whirl 40 formed integral therewith or having a driving fit thereon. At the ends above and below the whirl it presents the exterior cylindrical bearing surfaces 55 and 56 which seat in the bearings in the bifurcations 49 and 48 of the bracket arm. The bore of the tube presents three sections, first, a shallow, conical fiaring mouth 57 at the upper end, second, a cylindrical section 58 of relatively small diameter and, third, a cylindrical section 59 of relatively large diameter opening at the lower end of the tube. It will thus be seen that a relatively abrupt annular shoulder 60 is formed at. the junction of the cylindrical bore sections 58 and 59. At the upper end the twister tube is preferably formed to present a concentric rib 61, the inner surface of which constitutes r1-.prolongation of the conical, flaring mouth 57. This materially increases the entrance area of the mouth of the tube because thereby the entrance diameter of the mouth exceeds in diameter the body of the tube or the exterior diameter of the bearing 55.

The false twist in a twister tube is given by a. tip extension at the lower end of the tube. In the preferred construction of this invention, this tip extension is of general V-shape and is formed of relatively thin, fiat metal. It is mounted to bridge the tube wall at the lower end and to present its point 62 on the tube axis, while its legs 63 are secured in diametrically disposed slots in the tube wall and so that they do not project inward into the lower cylindrical section of the tube bore. The outer edges 64 of this V-shaped tip extension are symmetrically concave to enable the tube, when rotating, and as shown in i to the drawing rolls is guided and sepa- .rated by suitable separator pins mounted in the portion of the frame supporting the rolls 16 and 17. The roving ends, after passing through the guide eyes 26, balloon as they l are twisted and wound on to the bobbins and, Y

1d in order to maintain the ends from inter` z j ference, a series of separator plates 66 are provided between the spindles. These ,separator plates must be movable out of position in order to facilitate doiiing and replacement j of the bobbins. VFor that purpose a construction of separator plates and mountings of `the preferred construction shown in Figs.

7 `and S is provided. The traverse bar 33 at suitable intervals is provided with brackets 67. `In each of these brackets abearing stud 68 is removably mounted and held in position by a set screw 69. A separator supporting bar 70 is provided at its ends with bearing i brackets 71 journalled on the projecting ends of thebearing studs 68` and this bar 70 has rigidly secured thereto in proper spacing the separator plates 66. An entire series of separator plates may therefore be swungout of position, as from the full line position to the dotted line position shown in Fig. 7 to enable doiilng to take` place. Each series is placed in i proper working position by projections 7 2 on the bearing brackets 71 engaging the top of Y the traverse bar 33. i

` drawing rolls. With this invention the` tipV extension is brought close into the bite of efficient construction of twister tube and means for positioning and adjusting `each twister tube and each series of twister tubes is provided. i

The twister tubes are of symmetrical construction so that they may be rotated to produce either a right-hand or a left-hand twist simply by changing the drive. The false twist imparted by these tubes is effected by L the tip extension in the general manner common to all twister tubes, seizingthe sliver and giving ita few preliminary twists so as to enable it to stand the draft imparted by the the drawing rolls so that the full strength imparted by the false twist to the roving is taken advantage of in the drawing action.

Furthermore, it will be noted that the roving runs smoothly and evenly through the twister tube and there is nothing connected with the twister tube to impart any jerk, vibration or strain to the roving due to the construction of the tube.

The construction of the tube bore renders the twister tube self-threading. If a roving end breaks, the frame does not have to be stopped, but the operative simply drops the roving end into the flaring mouth 57 which,`

it will be seen, by reason of the construction `threading action of the tube isprobably due to the sudden increase of centrifugal action on the end of the roving as it enters the large cylindrical section 59 of the bore. j lt is found in practice that the roving end is automatically drawn through thetube as soon as the operative drops the end in at the top. This renders unnecessary the use `of pipe cleaners, hooks, wires or other devices for threading the broken end through the tube. The tube is so reduced inlength by the construction of this invention that the eXtreme end of the yarn beneath the point held by the operatives lingers may be of a length and stiffness sufficient to enable it to be dropped bythe operative into the larger section of the tube.

llt is very important in such a spinning frame that the twister tube shall be accurately positioned with respect to the drawing rolls. The adjustments provided enable each twistertube independently to beadj usted in position longitudinally of the rolls 5 also` rotarily of the supporting shaft 34 so as to determine the angle of `the axis of the twister tube with respect to the `vertical or parallel It will thus be seen that a very simple and cooperating drawing rolls is simply and ac-` cuately effected. i Furthermore, it is j frequently desirable to adjust the series of twister tubes as a whole with respect to the drawing rolls, as, for example, when required by achangein stock. Such an adjustment is also provided by the rotary adjustment of the supporting shaft as a whole.

These adjustments and the principlel of the tube construction enable the entrance end of the tube to be brought unusually close to the bite of the rolls so that the yarn travels a comparatively short distance from the mouth of the tube to the bite of the rolls.

The construction of the U-shaped aligned bearings such as 48 and 49 for the twister; tube enables the twister tube readily to be removed and replaced in the bearings whenever necessary and prevents the twister tube from moving endwise regardless of the direction in which it may be rotated. The beardriving belt to be slipped on and off the whirl over the bracket arms.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

l. In a spinning frame, a series of pairs of drawing rolls, a supporting shaft extending parallel with said rolls, a corresponding series of bracket arms mounted on the shaft and projecting radially thereofopposite the pairs of rolls, a twister tube having a point and rotatably journalled in each bracket arm with its point adjacent the bite of the rolls and with its axis extending normally to the roll axes, means for adjusting each bracket arm relatively to the shaft to position the corresponding tube with respect to the rolls and means for rotarily adjusting the said.

shaft on its axis thereby simultaneously and equally to adjust the positions of all the tubes with respect to the rolls.

2. In a spinning frame, a series of pairs of drawing rolls, a supporting shaft extending parallel with said rolls, a corresponding series of bracket arnis mounted on the shaft and projecting radially thereof opposite the pairs of rolls, a twister-tube rotatably journalled in each bracket arm with its point adjacent the bite of the rolls'and with it-s axis extending normally to the roll axes, and means for adjusting each bracket arm relatively to the shaft to enable the bearing for the twister tube to be adjusted radially to and from the supporting shaft and also longitudinally on the line of its axis while maintaining the axis parallel to a given tangent to the supporting shaft.

3. In a spinning frame, the construction defined in claim 2, together with means for rotarily adjusting the shaft, thereby simultaneously and equally to adj ustthe positions of all the tubes with respect to the rolls.

4. A twister tube supporting bracket arm composed of two sections, one section having at its free end a bearing for the twister tube, the other section having at its free end means for securing it to a support-ing shaft, and means for adjustably securing together the adjacent ends of said sections so as to enable the bearing for the twister tube to be adjusted radially to and from the supporting shaft and also longitudinally on the line of its axis while maintaining the axis parallel to a given A tangent to the supporting shaft.

A twister tube supporting bracket arm composed of two sections, one section having at its free end a bearing for the twister tube,

the other section having at its free end means for adjustably securing it both rotarily and longitudinally of a supporting shaft, and means for adjustably securin r together the adjacent ends of said sections so as to enable the bearing for the twister tube to be adjusted radially to and from the supporting shaft and also longitudinally on the line of its axis while maintaining the axis parallel to a given tangent to the supporting shaft.

6. A twister tube supporting bracket arm composed of two sections, one section having at its free end a bearing for the twister tube, the other section having at its free end means for securing it to a supporting shaft, the said sections overlapping at their adjacent ends and each provided with a slot, the slot in one section extending at right angles to the slot in the other section, and a clamping bolt extending through the slots thus adjustably to secure together the said sections so as to enable the bearing for the twister tube to be adjusted radially to and from the supporting shaft and also longitudinally on the line of its aXis while maintaining the axis parallel to a given tangent to the supporting shaft.

7. A twister tube for a spinning frame having at its ends exterior, cylindrical bearing surfaces, a whirl between said surfaces, the bore of the tube presenting three sections, first, a shallow, conical, flaring mouth at the upper end, second, a cylindrical section of relatively small diameter, third, a cylindrical section of relatively large diameter opening at the lower end, and a tip extension at the lower end with its point on the tube axis, whereby when the roving end is dropped into the flaring` mouth and down through the adjoining small, cylindrical section into the large cylindrical section, it will be suddenly thrown outward and drawn out through the lower end of the tube.

8. A twister tube for a spinning frame having the construction defined in claim 7, together with a concentric rib at the upper end of the tube, the inner surface of which constitutes a prolongation of the conical flaring mouth with the entrance of the mouth exceeding in diameter the body of the tube.

9. A twister tube fora spinning frame having at its ends exterior, cylindrical bearing surfaces, a whirl between said surfaces, the bore of the tube presenting three sections, first, a shallow, conical, flaring mouth at the upper end, second, a cylindrical section of relatively small diameter, third, a cylindrical section of relatively large diameter opening at the lower end, and a V-shaped tip extension diametrically bridging the tube wall at the lower end with its point on the tube axis.

10. A twister tube for a spinning frame having at its ends exterior, cylindrical bearing surfaces, a whirl between said surfaces, the bore of the tube presenting three sections, first, a shallow, conical, flaring mouth at the upper end, second, a cylindrical section of relatively small diameter, third, a cylindrical section ofV relatively. large diameter opening at the lower end, and a V-shaped tip extension diametrically bridging the tube wall at the lower end with its legs rigidly secured to the tube wall without projecting inllO ward of the lower cylindrical section thereof and with its point on the tube axis.

11. A twister tube for a spinning frame having the construction deiined in claim 9, in which the outer edges of the V-shaped tip extension are symmetrically concave to enable the extension, when the tube is rotating, to fit closely into the bite of a pair of drawing rolls.

12. A twister tube for a spinning frame l having atits ends exterior, cylindrical bearing surfaces, awhirl between said surfaces,

the bore of the tube presenting three sections, iirst, a shallow, conical, flaring mouth at the upper end, second, a cylindrical section of relatively small diameter, third, a cylindical the tube wall and with its point on the tube axis.

14. A twister tube for a spinning frame having the construction defined in claim 13, in which the outer edges of the legs of the y said tip extension are symmetrically concave to enable the extension, when the tube is rotating, to lit close to the bite of a pair of drawing rolls.

15. A twister tube :tor a spinning frame having at its upper end a concentric exterior rib and having at its upper end a shallow,

conical, flaring mouth extending into the rib and of greater diameter at its entrance than the diameter of the body of the tube.

16. A twister tube for a spinning frame having at its lower end a V-shaped tip extension, the outer edges of which are symmetrically concave to enable the extension, when the tip is rotating, to iit closely into the bite of a pair of drawing rolls.

In testimony whereof, `l: `have signed my name to this specification. HERMAN H. LEONARD. 

